Smartphones gain instant popularity due to its portable nature and ability to perform wide range of applications similar to a computer. The only down side is that smartphones battery life is limited compared to an analog phone. Young professionals who are always on the go have no access to an outlet to charge their smartphones whenever they run out of battery. This can be frustrating especially if you are going on a business trip or just taking a holiday from work. But worry no more! You don’t have to run out of battery again whenever and wherever. Thanks to power banks that made charging so convenient and easy allowing people to have a portable power supply when all other charging options are nowhere to be found. You can buy them from electronic shops or you can fabricate your own. Here’s how you can start your DIY power bank project.
- Gather all the necessary materials for your power bank.
Prepare the necessary materials for your DIY power bank project. Obtain some batteries which are either 3.7V or 4V. You may use your old laptop batteries as well. You will also need a cellphone cord which you can obtain from old cellphone chargers or the one you use to charge your phone in your car. Also prepare electrical tape, glue, cutter and toggle switch. A plug will also be necessary. You will also need a wire cutter or nose pliers to cut the wires from your old cellphone charger. Grab a food container to put all the materials inside and keep them organized.
- Disassemble your power source and connect all the materials together .
If you are using an old laptop battery, carefully open it by inserting a screw driver into the weak spot along the seams. This can be a little tricky since some of them require more effort because they are strongly bonded to each other. For safety purposes, prepare some fireproof container with a sand in case the li ion cells start to heat up. Sand is the only way to deal with a lithium fire so make sure you have readily available in case of emergency. Remove the li ion cells and separate them with a cutter. Identify the good cells for these will be the power source for your power bank. Remove the solder tabs in the batteries by using a nose pliers. When the tabs are removed, you can now flatten the surface of the weld points. Be careful on removing the tabs because they are quite sharp and may cut your hands. Check the voltage of the li ion cells. Charge them but make sure they don’t get hot; otherwise throw them away. Recheck the voltage after charging and ensure that it doesn’t fall beyond 4V. Now, cut the end of the charger so you can strip the wires and connect the positive to a toggle switch. Connect the negative wire on the negative part of the battery pack and the negative wire of the plug. Use an electrical tape to keep them in place. Put them altogether in a food container to keep them in place. Now you can start charging your phone.
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